535 lines
19 KiB
Go
535 lines
19 KiB
Go
package instances
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import (
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"fmt"
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"strings"
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"testing"
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"github.com/google/go-cmp/cmp"
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"github.com/zclconf/go-cty/cty"
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"github.com/hashicorp/terraform/internal/addrs"
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)
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func TestExpander(t *testing.T) {
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// Some module and resource addresses and values we'll use repeatedly below.
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singleModuleAddr := addrs.ModuleCall{Name: "single"}
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count2ModuleAddr := addrs.ModuleCall{Name: "count2"}
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count0ModuleAddr := addrs.ModuleCall{Name: "count0"}
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forEachModuleAddr := addrs.ModuleCall{Name: "for_each"}
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singleResourceAddr := addrs.Resource{
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Mode: addrs.ManagedResourceMode,
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Type: "test",
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Name: "single",
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}
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count2ResourceAddr := addrs.Resource{
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Mode: addrs.ManagedResourceMode,
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Type: "test",
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Name: "count2",
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}
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count0ResourceAddr := addrs.Resource{
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Mode: addrs.ManagedResourceMode,
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Type: "test",
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Name: "count0",
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}
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forEachResourceAddr := addrs.Resource{
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Mode: addrs.ManagedResourceMode,
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Type: "test",
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Name: "for_each",
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}
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eachMap := map[string]cty.Value{
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"a": cty.NumberIntVal(1),
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"b": cty.NumberIntVal(2),
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}
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// In normal use, Expander would be called in the context of a graph
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// traversal to ensure that information is registered/requested in the
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// correct sequence, but to keep this test self-contained we'll just
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// manually write out the steps here.
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//
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// The steps below are assuming a configuration tree like the following:
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// - root module
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// - resource test.single with no count or for_each
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// - resource test.count2 with count = 2
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// - resource test.count0 with count = 0
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// - resource test.for_each with for_each = { a = 1, b = 2 }
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// - child module "single" with no count or for_each
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// - resource test.single with no count or for_each
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// - resource test.count2 with count = 2
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// - child module "count2" with count = 2
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// - resource test.single with no count or for_each
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// - resource test.count2 with count = 2
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// - child module "count2" with count = 2
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// - resource test.count2 with count = 2
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// - child module "count0" with count = 0
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// - resource test.single with no count or for_each
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// - child module for_each with for_each = { a = 1, b = 2 }
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// - resource test.single with no count or for_each
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// - resource test.count2 with count = 2
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ex := NewExpander()
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// We don't register the root module, because it's always implied to exist.
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//
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// Below we're going to use braces and indentation just to help visually
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// reflect the tree structure from the tree in the above comment, in the
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// hope that the following is easier to follow.
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//
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// The Expander API requires that we register containing modules before
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// registering anything inside them, so we'll work through the above
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// in a depth-first order in the registration steps that follow.
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{
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ex.SetResourceSingle(addrs.RootModuleInstance, singleResourceAddr)
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ex.SetResourceCount(addrs.RootModuleInstance, count2ResourceAddr, 2)
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ex.SetResourceCount(addrs.RootModuleInstance, count0ResourceAddr, 0)
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ex.SetResourceForEach(addrs.RootModuleInstance, forEachResourceAddr, eachMap)
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ex.SetModuleSingle(addrs.RootModuleInstance, singleModuleAddr)
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{
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// The single instance of the module
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moduleInstanceAddr := addrs.RootModuleInstance.Child("single", addrs.NoKey)
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ex.SetResourceSingle(moduleInstanceAddr, singleResourceAddr)
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ex.SetResourceCount(moduleInstanceAddr, count2ResourceAddr, 2)
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}
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ex.SetModuleCount(addrs.RootModuleInstance, count2ModuleAddr, 2)
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for i1 := 0; i1 < 2; i1++ {
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moduleInstanceAddr := addrs.RootModuleInstance.Child("count2", addrs.IntKey(i1))
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ex.SetResourceSingle(moduleInstanceAddr, singleResourceAddr)
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ex.SetResourceCount(moduleInstanceAddr, count2ResourceAddr, 2)
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ex.SetModuleCount(moduleInstanceAddr, count2ModuleAddr, 2)
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for i2 := 0; i2 < 2; i2++ {
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moduleInstanceAddr := moduleInstanceAddr.Child("count2", addrs.IntKey(i2))
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ex.SetResourceCount(moduleInstanceAddr, count2ResourceAddr, 2)
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}
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}
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ex.SetModuleCount(addrs.RootModuleInstance, count0ModuleAddr, 0)
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{
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// There are no instances of module "count0", so our nested module
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// would never actually get registered here: the expansion node
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// for the resource would see that its containing module has no
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// instances and so do nothing.
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}
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ex.SetModuleForEach(addrs.RootModuleInstance, forEachModuleAddr, eachMap)
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for k := range eachMap {
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moduleInstanceAddr := addrs.RootModuleInstance.Child("for_each", addrs.StringKey(k))
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ex.SetResourceSingle(moduleInstanceAddr, singleResourceAddr)
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ex.SetResourceCount(moduleInstanceAddr, count2ResourceAddr, 2)
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}
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}
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t.Run("root module", func(t *testing.T) {
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// Requesting expansion of the root module doesn't really mean anything
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// since it's always a singleton, but for consistency it should work.
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got := ex.ExpandModule(addrs.RootModule)
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want := []addrs.ModuleInstance{addrs.RootModuleInstance}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("resource single", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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addrs.RootModule,
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singleResourceAddr,
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`test.single`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("resource count2", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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addrs.RootModule,
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count2ResourceAddr,
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`test.count2[0]`),
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mustAbsResourceInstanceAddr(`test.count2[1]`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("resource count0", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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addrs.RootModule,
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count0ResourceAddr,
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)
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want := []addrs.AbsResourceInstance(nil)
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("resource for_each", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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addrs.RootModule,
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forEachResourceAddr,
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`test.for_each["a"]`),
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mustAbsResourceInstanceAddr(`test.for_each["b"]`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module single", func(t *testing.T) {
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got := ex.ExpandModule(addrs.RootModule.Child("single"))
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want := []addrs.ModuleInstance{
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mustModuleInstanceAddr(`module.single`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module single resource single", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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mustModuleAddr("single"),
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singleResourceAddr,
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr("module.single.test.single"),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module single resource count2", func(t *testing.T) {
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// Two different ways of asking the same question, which should
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// both produce the same result.
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// First: nested expansion of all instances of the resource across
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// all instances of the module, but it's a single-instance module
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// so the first level is a singleton.
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got1 := ex.ExpandModuleResource(
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mustModuleAddr(`single`),
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count2ResourceAddr,
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)
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// Second: expansion of only instances belonging to a specific
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// instance of the module, but again it's a single-instance module
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// so there's only one to ask about.
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got2 := ex.ExpandResource(
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count2ResourceAddr.Absolute(
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addrs.RootModuleInstance.Child("single", addrs.NoKey),
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),
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`module.single.test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.single.test.count2[1]`),
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}
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if diff := cmp.Diff(want, got1); diff != "" {
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t.Errorf("wrong ExpandModuleResource result\n%s", diff)
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}
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if diff := cmp.Diff(want, got2); diff != "" {
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t.Errorf("wrong ExpandResource result\n%s", diff)
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}
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})
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t.Run("module single resource count2 with non-existing module instance", func(t *testing.T) {
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got := ex.ExpandResource(
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count2ResourceAddr.Absolute(
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// Note: This is intentionally an invalid instance key,
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// so we're asking about module.single[1].test.count2
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// even though module.single doesn't have count set and
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// therefore there is no module.single[1].
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addrs.RootModuleInstance.Child("single", addrs.IntKey(1)),
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),
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)
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// If the containing module instance doesn't exist then it can't
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// possibly have any resource instances inside it.
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want := ([]addrs.AbsResourceInstance)(nil)
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module count2", func(t *testing.T) {
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got := ex.ExpandModule(mustModuleAddr(`count2`))
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want := []addrs.ModuleInstance{
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mustModuleInstanceAddr(`module.count2[0]`),
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mustModuleInstanceAddr(`module.count2[1]`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module count2 resource single", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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mustModuleAddr(`count2`),
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singleResourceAddr,
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`module.count2[0].test.single`),
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mustAbsResourceInstanceAddr(`module.count2[1].test.single`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module count2 resource count2", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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mustModuleAddr(`count2`),
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count2ResourceAddr,
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`module.count2[0].test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.count2[0].test.count2[1]`),
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mustAbsResourceInstanceAddr(`module.count2[1].test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.count2[1].test.count2[1]`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module count2 module count2", func(t *testing.T) {
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got := ex.ExpandModule(mustModuleAddr(`count2.count2`))
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want := []addrs.ModuleInstance{
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mustModuleInstanceAddr(`module.count2[0].module.count2[0]`),
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mustModuleInstanceAddr(`module.count2[0].module.count2[1]`),
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mustModuleInstanceAddr(`module.count2[1].module.count2[0]`),
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mustModuleInstanceAddr(`module.count2[1].module.count2[1]`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module count2 module count2 GetDeepestExistingModuleInstance", func(t *testing.T) {
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t.Run("first step invalid", func(t *testing.T) {
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got := ex.GetDeepestExistingModuleInstance(mustModuleInstanceAddr(`module.count2["nope"].module.count2[0]`))
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want := addrs.RootModuleInstance
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if !want.Equal(got) {
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t.Errorf("wrong result\ngot: %s\nwant: %s", got, want)
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}
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})
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t.Run("second step invalid", func(t *testing.T) {
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got := ex.GetDeepestExistingModuleInstance(mustModuleInstanceAddr(`module.count2[1].module.count2`))
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want := mustModuleInstanceAddr(`module.count2[1]`)
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if !want.Equal(got) {
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t.Errorf("wrong result\ngot: %s\nwant: %s", got, want)
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}
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})
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t.Run("neither step valid", func(t *testing.T) {
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got := ex.GetDeepestExistingModuleInstance(mustModuleInstanceAddr(`module.count2.module.count2["nope"]`))
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want := addrs.RootModuleInstance
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if !want.Equal(got) {
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t.Errorf("wrong result\ngot: %s\nwant: %s", got, want)
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}
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})
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t.Run("both steps valid", func(t *testing.T) {
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got := ex.GetDeepestExistingModuleInstance(mustModuleInstanceAddr(`module.count2[1].module.count2[0]`))
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want := mustModuleInstanceAddr(`module.count2[1].module.count2[0]`)
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if !want.Equal(got) {
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t.Errorf("wrong result\ngot: %s\nwant: %s", got, want)
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}
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})
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})
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t.Run("module count2 resource count2 resource count2", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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mustModuleAddr(`count2.count2`),
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count2ResourceAddr,
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`module.count2[0].module.count2[0].test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.count2[0].module.count2[0].test.count2[1]`),
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mustAbsResourceInstanceAddr(`module.count2[0].module.count2[1].test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.count2[0].module.count2[1].test.count2[1]`),
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mustAbsResourceInstanceAddr(`module.count2[1].module.count2[0].test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.count2[1].module.count2[0].test.count2[1]`),
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mustAbsResourceInstanceAddr(`module.count2[1].module.count2[1].test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.count2[1].module.count2[1].test.count2[1]`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module count2 resource count2 resource count2", func(t *testing.T) {
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got := ex.ExpandResource(
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count2ResourceAddr.Absolute(mustModuleInstanceAddr(`module.count2[0].module.count2[1]`)),
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`module.count2[0].module.count2[1].test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.count2[0].module.count2[1].test.count2[1]`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module count0", func(t *testing.T) {
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got := ex.ExpandModule(mustModuleAddr(`count0`))
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want := []addrs.ModuleInstance(nil)
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module count0 resource single", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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mustModuleAddr(`count0`),
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singleResourceAddr,
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)
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// The containing module has zero instances, so therefore there
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// are zero instances of this resource even though it doesn't have
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// count = 0 set itself.
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want := []addrs.AbsResourceInstance(nil)
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module for_each", func(t *testing.T) {
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got := ex.ExpandModule(mustModuleAddr(`for_each`))
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want := []addrs.ModuleInstance{
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mustModuleInstanceAddr(`module.for_each["a"]`),
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mustModuleInstanceAddr(`module.for_each["b"]`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module for_each resource single", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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mustModuleAddr(`for_each`),
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singleResourceAddr,
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`module.for_each["a"].test.single`),
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mustAbsResourceInstanceAddr(`module.for_each["b"].test.single`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module for_each resource count2", func(t *testing.T) {
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got := ex.ExpandModuleResource(
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mustModuleAddr(`for_each`),
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count2ResourceAddr,
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`module.for_each["a"].test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.for_each["a"].test.count2[1]`),
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mustAbsResourceInstanceAddr(`module.for_each["b"].test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.for_each["b"].test.count2[1]`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run("module for_each resource count2", func(t *testing.T) {
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got := ex.ExpandResource(
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count2ResourceAddr.Absolute(mustModuleInstanceAddr(`module.for_each["a"]`)),
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)
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want := []addrs.AbsResourceInstance{
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mustAbsResourceInstanceAddr(`module.for_each["a"].test.count2[0]`),
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mustAbsResourceInstanceAddr(`module.for_each["a"].test.count2[1]`),
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run(`module.for_each["b"] repetitiondata`, func(t *testing.T) {
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got := ex.GetModuleInstanceRepetitionData(
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mustModuleInstanceAddr(`module.for_each["b"]`),
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)
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want := RepetitionData{
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EachKey: cty.StringVal("b"),
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EachValue: cty.NumberIntVal(2),
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}
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if diff := cmp.Diff(want, got, cmp.Comparer(valueEquals)); diff != "" {
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t.Errorf("wrong result\n%s", diff)
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}
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})
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t.Run(`module.count2[0].module.count2[1] repetitiondata`, func(t *testing.T) {
|
|
got := ex.GetModuleInstanceRepetitionData(
|
|
mustModuleInstanceAddr(`module.count2[0].module.count2[1]`),
|
|
)
|
|
want := RepetitionData{
|
|
CountIndex: cty.NumberIntVal(1),
|
|
}
|
|
if diff := cmp.Diff(want, got, cmp.Comparer(valueEquals)); diff != "" {
|
|
t.Errorf("wrong result\n%s", diff)
|
|
}
|
|
})
|
|
t.Run(`module.for_each["a"] repetitiondata`, func(t *testing.T) {
|
|
got := ex.GetModuleInstanceRepetitionData(
|
|
mustModuleInstanceAddr(`module.for_each["a"]`),
|
|
)
|
|
want := RepetitionData{
|
|
EachKey: cty.StringVal("a"),
|
|
EachValue: cty.NumberIntVal(1),
|
|
}
|
|
if diff := cmp.Diff(want, got, cmp.Comparer(valueEquals)); diff != "" {
|
|
t.Errorf("wrong result\n%s", diff)
|
|
}
|
|
})
|
|
|
|
t.Run(`test.for_each["a"] repetitiondata`, func(t *testing.T) {
|
|
got := ex.GetResourceInstanceRepetitionData(
|
|
mustAbsResourceInstanceAddr(`test.for_each["a"]`),
|
|
)
|
|
want := RepetitionData{
|
|
EachKey: cty.StringVal("a"),
|
|
EachValue: cty.NumberIntVal(1),
|
|
}
|
|
if diff := cmp.Diff(want, got, cmp.Comparer(valueEquals)); diff != "" {
|
|
t.Errorf("wrong result\n%s", diff)
|
|
}
|
|
})
|
|
t.Run(`module.for_each["a"].test.single repetitiondata`, func(t *testing.T) {
|
|
got := ex.GetResourceInstanceRepetitionData(
|
|
mustAbsResourceInstanceAddr(`module.for_each["a"].test.single`),
|
|
)
|
|
want := RepetitionData{}
|
|
if diff := cmp.Diff(want, got, cmp.Comparer(valueEquals)); diff != "" {
|
|
t.Errorf("wrong result\n%s", diff)
|
|
}
|
|
})
|
|
t.Run(`module.for_each["a"].test.count2[1] repetitiondata`, func(t *testing.T) {
|
|
got := ex.GetResourceInstanceRepetitionData(
|
|
mustAbsResourceInstanceAddr(`module.for_each["a"].test.count2[1]`),
|
|
)
|
|
want := RepetitionData{
|
|
CountIndex: cty.NumberIntVal(1),
|
|
}
|
|
if diff := cmp.Diff(want, got, cmp.Comparer(valueEquals)); diff != "" {
|
|
t.Errorf("wrong result\n%s", diff)
|
|
}
|
|
})
|
|
}
|
|
|
|
func mustAbsResourceInstanceAddr(str string) addrs.AbsResourceInstance {
|
|
addr, diags := addrs.ParseAbsResourceInstanceStr(str)
|
|
if diags.HasErrors() {
|
|
panic(fmt.Sprintf("invalid absolute resource instance address: %s", diags.Err()))
|
|
}
|
|
return addr
|
|
}
|
|
|
|
func mustModuleAddr(str string) addrs.Module {
|
|
if len(str) == 0 {
|
|
return addrs.RootModule
|
|
}
|
|
// We don't have a real parser for these because they don't appear in the
|
|
// language anywhere, but this interpretation mimics the format we
|
|
// produce from the String method on addrs.Module.
|
|
parts := strings.Split(str, ".")
|
|
return addrs.Module(parts)
|
|
}
|
|
|
|
func mustModuleInstanceAddr(str string) addrs.ModuleInstance {
|
|
if len(str) == 0 {
|
|
return addrs.RootModuleInstance
|
|
}
|
|
addr, diags := addrs.ParseModuleInstanceStr(str)
|
|
if diags.HasErrors() {
|
|
panic(fmt.Sprintf("invalid module instance address: %s", diags.Err()))
|
|
}
|
|
return addr
|
|
}
|
|
|
|
func valueEquals(a, b cty.Value) bool {
|
|
if a == cty.NilVal || b == cty.NilVal {
|
|
return a == b
|
|
}
|
|
return a.RawEquals(b)
|
|
}
|